/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.rest.service.api.repository;

import org.activiti.engine.ActivitiObjectNotFoundException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.activiti.rest.common.application.ContentTypeResolver;
import org.activiti.rest.service.api.RestResponseFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.util.List;


/**
 * @author Frederik Heremans
 */
@RestController
public class DeploymentResourceResource {

    @Autowired
    protected RestResponseFactory restResponseFactory;

    @Autowired
    protected ContentTypeResolver contentTypeResolver;

    @Autowired
    protected RepositoryService repositoryService;

    @RequestMapping(value = "/repository/deployments/{deploymentId}/resources/**", method = RequestMethod.GET, produces = "application/json")
    public DeploymentResourceResponse getDeploymentResource(@PathVariable("deploymentId") String deploymentId,
                                                            HttpServletRequest request) {

        // Check if deployment exists
        Deployment deployment = repositoryService.createDeploymentQuery().deploymentId(deploymentId).singleResult();
        if (deployment == null) {
            throw new ActivitiObjectNotFoundException("Could not find a deployment with id '" + deploymentId + "'.");
        }

        String pathInfo = request.getPathInfo();
        String resourceName = pathInfo.replace("/repository/deployments/" + deploymentId + "/resources/", "");

        List<String> resourceList = repositoryService.getDeploymentResourceNames(deploymentId);

        if (resourceList.contains(resourceName)) {
            // Build resource representation
            DeploymentResourceResponse response = restResponseFactory.createDeploymentResourceResponse(deploymentId, resourceName,
                    contentTypeResolver.resolveContentType(resourceName));
            return response;

        } else {
            // Resource not found in deployment
            throw new ActivitiObjectNotFoundException("Could not find a resource with id '" + resourceName
                    + "' in deployment '" + deploymentId + "'.");
        }
    }
}
